The president has been accused by a fiscal watchdog of manipulating the numbers of her government’s budget to disguise poor fiscal performance.

She has denied any wrongdoing.

Ms. Rousseff and her supporters are trying to get through the impeachment process as quickly as possible because they feel she has enough support in Congress at the moment to either derail the process before it reaches trial in the Senate, or to win there. The president could lose some of that support if the process is drawn out because information damaging to her case could come out, analysts say.